Automatic shock-absorber.



J.' W. BOLT.

AUTOMATIC SHOCK ABSORBBR. APPLICATIDN .HLBD JULY 7,1913.

Patented Jam. 5, MM5,

JOHN W. BOLT, OF ST. JOSEPH, IdiISSOURI.

eurer/Lario encon-Ansonnnn.

T azz whom a' may comm; Be it lrnown that I, JOHN W.-,H0LT, a citizen of the United States, residing atSt,V Joseph, 'in the-county of Buchanan vand State of Missouri, have'invented certain new and useful Improvements in Automatic Shock-Absorbers; and l do hereby declare the following to be a full, clear, and exact descriptionV of the invention, lsuch as will enable others skilled in theart to which it appertains to'make a'nd use the same.

rFhis invention relates to new and useful improvements in shock absorbers, and has particular reference to suchA devices deform of dashpot, in which the piston head' is so seated that both compression and eX- pansion .of the springs will be resisted.

The above and additional objects are accomplished by such means as are illustrated.

1n the accompanying drawings, described in lthe `ollowing specication andI then more' particularly pointed out in the claim which is appended hereto and application.

vVlithreference to the drawings, wherein liliana"v illustrated the preferred embodiment of my inventionas it is reduced topractice,

and throughoutthe several views of which l similar reference numerals designate corresponding parts: Figure l is a side elevationv illustrating the single `cylinder adapted for I use on this invention in assembled relation.

Fig.` 2 is a horizontaldetail sectional viewk taken `through the casing, Fig. 3 isa transverse sectional view of the piston' head, Fig. 4 is a bottom plan view of a modified form. ofipiston head, 'and Fig. 5 is a transverse -lsectional view taken on line 7-7 oFig. 4.

`Froceeding now to the description of the drawings and with particular reierenceto Fig. 2, the numeral 10 designates a cylindrical metallic casing, the 4lower end of which is provided with an integral closureI plate k11', and the upper end of which is suitably closed. The member lOZis in practice partly illed with oil toresist the piston Specification of Letters Patent.

forms a part of this Patented Jan. 5, 112115.`

. Application led July 7, 1913. Serial No. 777,726.

` head 13, which. is detachably secured by a.

nut on the lower screw threaded terminal of a piston rod 15, the upper terminal fof which is provided with` an apertured plate 16, designed to bebo'lted or otherwise secured to the 'upper portion of a. spring chassis or frame of the automobile. The member 10 which is essentially 'a dashpot,`is secured to theaxle of the automobile bya pair of 'spaced-,laterally extending bracket .arms 17 and 18 which are-arranged above and below the axle and are clamped thereon by a bolt19. The piston head 13, illustrated" m detall m Figs. 2 and 3, consists essentially 'in a` cylindrical plate provided with a plurality of orifices 20 through 4which the oil passes when the piston rod 15 moves up or downvwith the compression or expansion of the springs of the automobile.

' The 'modiied form of piston head is illustrated particularly in F igs; 4 and 5. This modified form4 includes a circular plate 2l I formed withl` several annular series of apertures or orifices as at 22. The central portion of the member 21 is formed with segmental openings as at 23, When the piston v,head moves downwardly, these openings 23 are closed by a circular' valve plate 24 apertured and loosely mountedior sliding movement on a headed stub pin 25 -screw'threaded 'into thelower terminal of the piston rod 26. ll/'hen the springs expand and the member 21-` again moves to the upper end of the dashpot, the plate 24 is forced away from the openings 23, as indicated in'Fig. 5, and

the 'oil passes through the openings 23, thus preventing, in as large a measure as possible, the retarding of the expansion of the lln reduction to practice, I have found that the form of my invention, illustrated in the drawings and referredto in the above description, as thel preferred embodiment, is the most'eliicient 'and practical; yet realizing'that the conditions concurrent with the adoption of my device will necessarily vary,

l desire to emphasize the factthat various minor changes in details of construction,

Aproportion and arrangement of. parts may be resorted to, when required, without sacril'icinganyof theadvantages of my invention, as defined inthe appended claim.

ics

Having thus described .my inventiornwhat ll claim is: i

lThe combination with an automobile of a cylindrical dash pot adapted to receive a v Jaeent its periphery, a headed pin'deta'eh-- ably secured to the under face of said piston quantity of oil, 'meansj for securing said dash pot to the aXle of the automobile, a piston head slidably mounted in said dash pot and provided with central .segmental openings and series of `circular openings adhead, a disk .valve jslidable upon said pin and adapted to close the segmental lopenings in said pistonhead upon the downward movement of said piston and to move in open position in the upward movement of said piston and a piston rod operatively connecting said piston head to the chassis of an automobile.

/ In testimony whereofA I aiiix my signature 

